Microsoft W840DI - Manual (Page 9)

User's Guide Before You Begin
Note:
The keyboard is with backlight design. When the system is powered on, you
can press key combination (Fn+F10) to activate and deactivate the keyboard
backlight function.
For details on Function keys, please refer to Chapter 1.13.
Note:
Press this key combination (Fn+F4) to power on and power off the Web Cam
module. After powering on the Web Cam, you need to activate its function
through Windows™.
Top View
Two System LEDs
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